Air System (Optional)
Chapter 3: Theory of Operation
3 - 8 Affinity® Four Birthing Bed Service Manual (195826 REV 2)
AIR SYSTEM (OPTIONAL)
AIR PUMP AND MANIFOLD
The optional air system uses a linear air pump and solenoid valve manifold to inflate and deflate the seat
and lumbar bladders in correctly equipped mattresses. The pump and solenoid valve manifold are
controlled by the logic control P.C. board.
The pump supplies air pressure to the solenoid valve manifold, and the seat or lumbar solenoid valve
opens to allow air flow into the air bladder in the applicable section of the mattress. The solenoid valve
manifold opens the deflate valve and the seat or lumbar valve to allow air flow out of the air bladder in
the applicable section of the mattress.
AIR MATTR ESS AND AIR BLADDERS
The optional air mattress is a version of the standard mattress with an air bladder in the seat section and
another air bladder in the lower part of the head section. The air pressure is controlled by input from the
caregiver and patient siderail controls.
The air bladders are inflated when the inflate control on the siderail panel is activated, and maintain the
air pressure until the deflate control is activated.
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